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x≠ 0
(4 - x) / x² - 2x / x² - 1 ≥ 0
(4 - x - 2x) / x² - x²/x² ≥ 0
(4 - 3x - x²) / x² ≥ 0
x²(-x² - 3x + 4) ≥ 0
-x² (x² + 3x - 4) ≥ 0
x²(x² + 3x - 4) ≤ 0
Δ = 9 + 16 = 25
x1 = (-3 - 5)/2 = -8/2 = -4
x2 = (-3 + 5)/2 = 2/2 = 1
x²(x + 4)(x - 1)≤ 0
0 -4 1
x ∈ <-4, 0> u <1, +oo) i D: x≠ 0
odp. x ∈ <-4, 0) u <1, +oo)
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x≠ 0
(4 - x) / x² - 2x / x² - 1 ≥ 0
(4 - x - 2x) / x² - x²/x² ≥ 0
(4 - 3x - x²) / x² ≥ 0
x²(-x² - 3x + 4) ≥ 0
-x² (x² + 3x - 4) ≥ 0
x²(x² + 3x - 4) ≤ 0
Δ = 9 + 16 = 25
x1 = (-3 - 5)/2 = -8/2 = -4
x2 = (-3 + 5)/2 = 2/2 = 1
x²(x + 4)(x - 1)≤ 0
0 -4 1
x ∈ <-4, 0> u <1, +oo) i D: x≠ 0
odp. x ∈ <-4, 0) u <1, +oo)